BACKLIGHT UNIT MANUFACTURING METHOD THEREOF AND DISPLAY APPARATUS INCLUDING THE SAME

• Main Authors: BANG, JUNG SUK, BAE, KWANG SOO, OH, MIN JEONG, YUN, HAE JU
• Format: Patent
• Language: English; Korean
• Published: 09.05.2018
• Subjects: BLASTING; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; FREQUENCY-CHANGING; FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF; HEATING; LIGHTING; MECHANICAL ENGINEERING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; WEAPONS

The present invention provides a backlight unit with reduced thickness and improved luminance uniformity. A method of manufacturing a backlight unit according to an embodiment of the present invention comprises the steps of preparing a light guide member including a top surface on which a plurality of contact areas and a cavity area surrounding the contact areas are defined, a light entrance surface, and a light entrance surface facing the light entrance surface; forming a plurality of first sacrificial patterns overlapping the cavity region on the light guiding member and having the same width as each other; forming a first insulating layer on the light guide member on which the first sacrificial patterns are formed; removing the first sacrificial patterns to form a cavity between the light guiding member and the first insulating film, and forming a second insulating film on the first insulating film, wherein the number of the first sacrificial patterns disposed between the contact regions decreases as the distance from the light incidence surface increases. 본 발명의 일 실시 예에 따른 백라이트 유닛의 제조 방법은 복수의 접촉 영역들과 상기 접촉 영역들을 둘러싸는 공동 영역이 정의되는 상면, 입광면 및 상기 입광면과 대향하는 대광면을 포함하는 도광 부재를 준비하는 단계, 상기 도광 부재 상에 상기 공동 영역과 중첩하고, 서로 동일한 폭을 갖는 복수의 제1 희생 패턴들을 형성하는 단계, 상기 제1 희생 패턴들이 형성된 상기 도광 부재 상에 제1 절연막을 형성하는 단계, 상기 제1 희생 패턴들을 제거하여 상기 도광 부재 및 상기 제1 절연막 사이에 공동을 형성하는 단계, 및 상기 제1 절연막 상에 제2 절연막을 형성하는 단계를 포함하고, 상기 접촉 영역들 사이에 배치된 상기 제1 희생 패턴들의 개수는 상기 입광면과 멀어질수록 감소한다.